Novel jet mixer

Abstract

The utility model discloses a novel jet mixer, and mainly relates to the technical field of jet mixers. Comprising a shrinkage pipe, a throat pipe and a diffusion pipe which are sequentially and coaxially communicated, the shrinkage pipe and the diffusion pipe are in reverse horn mouth shapes, a pressurizing block is arranged above the throat pipe, an inclined pressurizing face is arranged on the bottom face of the pressurizing face, one side of the pressurizing face is connected with the inner wall, close to one end of the shrinkage pipe, of the throat pipe, and the other side of the pressurizing face inclines downwards. A vacuum face perpendicular to the pressurizing face is arranged at the end, close to the diffusion pipe, of the pressurizing block, an air inlet pipe communicated with an air source is arranged on the upper portion of the throat pipe, and an air spraying opening located behind the vacuum face is formed in the bottom end of the air inlet pipe. The sewage treatment device has the beneficial effect that the contact and mixing effects of sewage and gas are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of jet mixers, in particular to a novel jet mixer. Background Art

[0002] The jet mixer is a device that mixes two different fluid media by changing the diameter of the pipe, forms a mixed fluid through energy exchange, and ejects the working fluid with a certain pressure through the nozzle at high speed, so that the pressure energy is converted into speed energy. It can save mechanical energy and obtain a better mixing effect.

[0003] Most of the existing ejectors introduce the second fluid at the central contracted throat or in front of the throat. In the application environment of introducing gas into sewage, after adding gas and sewage using the existing mixer, the contact between the gas and sewage is insufficient, the gas is dispersed unevenly, and a good crushing and mixing effect of the gas and sewage cannot be obtained. Utility Model Content

[0004] The utility model aims to provide a novel jet mixer, which can enhance the full contact between gas and sewage and improve the mixing effect of sewage and gas.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical solutions:

[0006] A novel jet mixer comprises a contraction tube, a throat and a diffuser which are coaxially connected in sequence, wherein the contraction tube and the diffuser are in the shape of inverted trumpets, a boosting block is provided above the throat, the boosting block has an inclined boosting surface on the bottom, one side of the boosting surface is connected to the inner wall of the throat near one end of the contraction tube, and the other side of the boosting surface is inclined downward, a vacuum surface perpendicular to the boosting surface is provided at one end of the boosting block near the diffuser, an air inlet pipe connected to an air source is provided at the upper part of the throat, and the bottom end of the air inlet pipe has an air jet located behind the vacuum surface.

[0007] The pressurizing surface is co-directionally parallel to the normal line of the shrink tube.

[0008] The bottom side of the boost block is located at the upper 1 / 3 position of the throat.

[0009] The jet port is rotatably sleeved with a rotating sleeve, and the rotating sleeve is provided with stirring blades in an annular array. The stirring blades extend in the axial direction, and the stirring blades are blades with a twisted structure.

[0010] The air intake pipe includes an upright portion and a mounting portion, the jet port is arranged at the bottom end of the mounting portion, the mounting portion penetrates the supercharging block, the bottom end of the upright portion is connected and fixed to the top end of the mounting portion, and the upright portion is vertically arranged above the throat.

[0011] A one-way valve is installed on the upright portion.

[0012] The one-way valve includes a straight tube-type valve body coaxial with the upright portion, a cylindrical valve cavity coaxial with the upright portion is provided in the valve body, an annular valve port is provided at the upper portion of the valve cavity, a valve block adapted thereto is provided in the valve port, a valve sheet completely covering the valve port is provided on the bottom side of the valve block, the valve sheet and the valve cavity are slidably matched up and down, and a coil spring is installed between the valve sheet and the valve cavity.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] During specific use, the sewage enters the jet channel through the liquid inlet, and enters the throat through the contraction tube. The space gradually decreases, and after entering the throat, the space is further compressed by the boost surface, thereby generating an underpressure area behind the vacuum surface. Under the action of the pressure difference, external air is sucked into the intake pipe, where it can come into contact with the sewage that has been accelerated and be fully mixed, thereby improving the mixing efficiency.

[0015] The rotating stirring blades of the jet outlet disperse the airflow, which can significantly improve the situation in which the gas phase is driven toward the central low-pressure area and the liquid phase moves toward the wall under the action of radial centrifugal force and turbulent dispersion force, that is, the gas-liquid two-phase stratification, thereby improving the contact and mixing effect between sewage and gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the internal structure of the utility model (viewed from the direction of the shrink tube).

[0018] Figure 3 It is a schematic diagram of the internal structure of the boosting block part of the utility model.

[0019] Figure 4 It is a schematic diagram of the installation of the air intake pipe and the rotating sleeve of the utility model.

[0020] Figure 5 It is a schematic diagram of the internal structure of Example 2 of the utility model.

[0021] Figure 6 This utility model Figure 5 Enlarged view of the middle part.

[0022] Figure 7 It is a cross-sectional view of the one-way valve of the utility model.

[0023] Figure 8 It is a schematic diagram of the internal structure of the one-way valve of the utility model.

[0024] Numbers shown in the accompanying drawings:

[0025] 1. Contraction tube; 2. Throat; 3. Diffuser; 4. Boosting block; 5. Boosting surface; 6. Vacuum surface; 7. Upright portion; 8. Mounting portion; 9. Jet port; 10. Rotating sleeve; 11. Stirring blade; 12. One-way valve; 13. Valve cavity; 14. Valve port; 15. Valve block; 16. Valve plate; 17. Slide bar; 18. Slide groove; 19. Annular bump; 20. Coil spring; 21. Fixed seat; 22. Arc top surface; 23. Uphill slope; 24. Bump. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0027] Example 1: Novel jet mixer

[0028] Similar to the main structure of a conventional venturi, the structure of the jet mixer mainly includes a contraction tube 1, a throat tube 2, and a diffusion tube 3 which are connected and communicated in sequence. The jet channel structure that contracts first and then expands enables the sewage to obtain energy in the throat tube 2 and obtain a water flow with an enhanced flow rate.

[0029] The shrink tube 1 is provided with a liquid inlet at one end away from the throat 2, and the edge of the liquid inlet is usually fixed to the end of the upstream sewage pipe through a flange. The diffuser tube 3 is provided with a liquid outlet at one end away from the throat 2, and one end of the liquid outlet is usually fixed to the downstream water pipe through a flange.

[0030] The contraction tube 1 and the diffusion tube 3 are in the shape of inverted trumpets and are butted together by a cylindrical throat tube 2. The inner diameter of the throat tube 2 is 1 / 2 to 1 / 3 of the maximum inner diameter of the diffusion tube 3 and the contraction tube 1, thereby obtaining a better speed-increasing effect.

[0031] In order to improve the mixing effect, a boosting block 4 is provided above the throat 2. The boosting block 4 is fixedly connected to the inner wall of the top of the throat 2 and is integrally formed. The longitudinal section of the boosting block 4 is a triangle. The boosting block 4 is provided with an inclined boosting surface 5 at the bottom, and the boosting block 4 is provided with a vacuum surface 6 at one end close to the diffuser 3. The vacuum surface 6 is perpendicular to the boosting surface. The inclination direction and angle of the boosting surface 5 are parallel to the normal of the contraction tube 1, so as to facilitate the diversion and acceleration of the sewage fluid.

[0032] An air intake pipe runs through the boost block 4, and the air intake pipe includes an upright portion 7 and a mounting portion 8. The upright portion 7 is vertically fixed at the upper middle position of the throat 2, and the bottom end of the upright portion 7 is connected to the mounting portion 8 by bending. The bottom end of the mounting portion 8 is provided with a jet port 9, and the mounting portion 8 is inclined in the same direction as the boost surface 5 and runs through the boost block 4, and the bottom end of the mounting portion 8 passes through the vacuum surface 6 so that the jet port 9 is exposed to an end area of ​​the diffuser 3 close to the throat 2, thereby introducing external gas into the rear area of ​​the vacuum surface 6.

[0033] The energy exchange of sewage in the throat pipe 2 is enhanced by the pressurizing surface 5. The lower side of the pressurizing surface 5 occupies 1 / 3 of the spherical cap portion above the throat pipe 2, which can increase the speed of sewage more than the ordinary throat pipe 2. At the same time, the top pressurizing slope is used to enhance the vacuum effect through the abruptly increased space behind the vacuum surface 6, so that the gas is sucked into this position to form a high-speed collision, contact and mixing with the liquid that has passed and has been accelerated.

[0034] In order to further enhance the dispersion and distribution of the gas so that it can be more fully mixed with the sewage, a rotating sleeve 10 is coaxially mounted on the jet port 9 at the bottom of the air inlet pipe through a bearing, and a circular array of stirring blades 11 is arranged on the rotating sleeve 10. The stirring blades 11 extend in the axial direction. The stirring blades 11 are selected to use blades with a torsion angle. The stirring blades 11 automatically rotate at a high speed under the impact of the gas from the jet port 9, and the direction of the gas ejected from the jet port 9 is dispersed, so that it can better contact with the sewage. A one-way valve 12 is installed on the upright portion 7, and the flow direction of the one-way valve 12 is one-way flow from the upright portion 7 to the mounting portion 8. Its specific structure is as follows: the one-way valve 12 includes a straight tube valve body coaxial with the upright portion 7, the bottom end of the valve body is fixedly connected and communicated with the top end of the upright portion 7, a cylindrical valve cavity 13 coaxial with the upright portion 7 is provided in the valve body, an annular valve port 14 is provided at the upper part of the valve cavity 13, the inner diameter of the valve port 14 is smaller than the inner diameter of the valve cavity 13, a valve block 15 adapted to the valve port 14 is provided in the valve port 14, the diameter of the valve block 15 corresponds to the diameter of the valve port 14, and the valve port 14 can be completely blocked to close it, a cut angle is provided on the top side edge of the valve block 15 to facilitate insertion into the valve port 14, a valve sheet 16 with a diameter larger than the valve port 14 and smaller than the valve cavity 13 is provided on the bottom side of the valve block 15, the valve sheet 16 completely covers the valve port 14, and assists the valve block 15 in completing the valve port 14 The valve plate 16 is provided with four slide bars 17 fixed on the circumference side, and the side wall of the valve cavity 13 is provided with four slide grooves 18 in an annular array. The slide bar 17 is located in the slide groove 18 and the two are connected in a sliding manner along the length direction of the valve cavity 13. A coil spring 20 is provided below the valve plate 16, and an annular protrusion 19 is provided at the bottom of the valve cavity 13. The bottom of the coil spring 20 abuts against the top surface of the annular protrusion 19. A cross-shaped fixing seat 21 is provided on the bottom surface of the valve plate 16. The four outer ends of the fixing seat 21 are respectively fixed on the slide bar 17. The fixing seat 21 penetrates the top of the coil spring 20 and is fixedly installed with the coil spring 20, so that the valve block 15, the valve plate 16 and the slide bar 17 cooperate with the top of the coil spring 20 to achieve the tightening of the valve port 14. Based on the above structure, the gas can only enter the intake pipe from top to bottom, and cannot circulate in the reverse direction, so as to avoid the backflow of the gas-liquid mixed fluid.

[0035] During specific use, sewage enters the jet channel through the liquid inlet, enters the throat pipe 2 through the contraction tube 1, and the space gradually decreases. After entering the throat pipe 2, the space is further compressed through the boost surface 5, thereby generating an underpressure area behind the vacuum surface 6. Under the action of the pressure difference, external air is sucked into the air intake pipe, and after passing through the one-way restriction of the one-way valve 12, it drives the stirring blades 11 to rotate when passing through the jet port 9. The rotating blades further disperse the incoming airflow, enhance the dispersion of the gas, and improve the contact and mixing effect between sewage and gas.

[0036] Example 2: New jet mixer

[0037] In this example, on the basis of Example 1, in order to enhance the mixing effect, a protrusion 24 is provided at the bottom of the inner wall of the diffuser 3 near the end of the throat 2, the bottom surface of the protrusion 24 is in contact with and fixed to the bottom peripheral surface of the inner wall of the diffuser 3, the center of the protrusion 24 is arched upward to form an arc-shaped top surface 22, and the arc-shaped top surface 22 is the highest point of the protrusion 24, and its front side is an uphill slope 23, and the rear side of the arc-shaped top surface 22 is a downhill slope (the front side and the rear side are both expressed relative to the flow direction of the fluid), and the arc-shaped top surface 22 is located at the rear of the jet port 9, so that the fluid in this area can obtain a secondary speed-increasing mixed flow, and after the gas and sewage are mixed, a secondary synergistic mixing effect can be obtained. At the same time, the front side of the uphill slope 23 to the rear end of the throat 2 can divert the sewage upward, so that the flow direction of the sewage has an upward trend, which is more conducive to mixing with the gas upward. Accelerate the contact between the added gas (or gas-liquid mixture) and the sewage and improve the mixing efficiency.

Claims

1. A novel jet mixer, comprising a contraction tube, a throat tube, and a diffusion tube which are coaxially connected in sequence, wherein the contraction tube and the diffusion tube are in the shape of reverse bell mouths, characterized in that: A boosting block is provided above the throat, and the boosting block has an inclined boosting surface on the bottom surface, one side of the boosting surface is connected to the inner wall of the throat close to the contraction tube, and the other side of the boosting surface is inclined downward, and a vacuum surface perpendicular to the boosting surface is provided at the end of the boosting block close to the diffuser, an air intake pipe connected to the air source is provided on the upper part of the throat, and the bottom end of the air intake pipe has an air jet located behind the vacuum surface.

2. A novel jet mixer according to claim 1, characterized in that: The pressurizing surface is co-directionally parallel to the normal line of the shrink tube.

3. A novel jet mixer according to claim 1, characterized in that: The bottom side of the boost block is located at the upper 1 / 3 position of the throat.

4. A novel jet mixer according to claim 1, characterized in that: The jet port is rotatably sleeved with a rotating sleeve, and the rotating sleeve is provided with stirring blades in an annular array. The stirring blades extend in the axial direction, and the stirring blades are blades with a twisted structure.

5. A novel jet mixer according to claim 1, characterized in that: The air intake pipe includes an upright portion and a mounting portion, the jet port is arranged at the bottom end of the mounting portion, the mounting portion penetrates the supercharging block, the bottom end of the upright portion is connected and fixed to the top end of the mounting portion, and the upright portion is vertically arranged above the throat.

6. A novel jet mixer according to claim 5, characterized in that: A one-way valve is installed on the upright portion.

7. A novel jet mixer according to claim 6, characterized in that: The one-way valve includes a straight tube-type valve body coaxial with the upright portion, a cylindrical valve cavity coaxial with the upright portion is provided in the valve body, an annular valve port is provided at the upper portion of the valve cavity, a valve block adapted thereto is provided in the valve port, a valve sheet completely covering the valve port is provided on the bottom side of the valve block, the valve sheet and the valve cavity are slidably matched up and down, and a coil spring is installed between the valve sheet and the valve cavity.

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